{"query_echo":{"q":"","filters":{"analysis_type":["geographic risk assessment"]},"warnings":[{"code":"facet_value_not_in_vocabulary","message":"Value 'geographic risk assessment' for facet 'analysis_type' is not in the controlled vocabulary."}]},"total":{"value":2,"relation":"eq"},"page":1,"page_size":20,"self":"https://climateinsightsdirectory.org/api/v1/search?analysis_type=geographic+risk+assessment","stability":"beta","ai_marking":{"digital_source_type":{"uri":"http://cv.iptc.org/newscodes/digitalsourcetype/trainedAlgorithmicMedia","name":"Created using Generative AI"},"notice":"Summary and key insights are generated using artificial intelligence."},"results":[{"id":"climcent-000031","url":"https://climateinsightsdirectory.org/document/climcent-000031","title":"More Mosquito Disease Days in 95% of Major U.S. Cities","publisher":{"name":"Climate Central","organization":"climate-central"},"document_type":"briefing","language":"en","date_published":"2026-07-22","source_url":"https://www.climatecentral.org/climate-matters/mosquito-disease-days","generator":"Climate Insights Directory","generated_fields":["summary","key_insights","climate_tags","geography_discussed","analysis_type"],"summary":{"text":"Climate Central's analysis of 239 major U.S. cities from 1970 to 2025 found that 95% of these cities experienced an increase in 'mosquito disease days'—days with temperatures suitable for West Nile virus transmission. On average, these cities saw an increase of 18 days per year. The largest increases occurred in the Southeast, Northeast, and Northwest regions, with San Francisco, CA, seeing the highest increase of 52 days. The report also notes that while West Nile virus is the most common mosquito-borne disease in the U.S., warming is expanding the risk and range of other viruses like dengue and Zika, particularly along the Gulf Coast and into the Ohio Valley and Upper Midwest by 2050.","ai_generated":true,"unit":"climcent-000031#summary","date_modified":"2026-10-23"},"key_insights":[{"text":"Between 1970 and 2025, 95% (227) of the 239 analyzed U.S. cities saw an increase in annual mosquito disease days, which are days with average temperatures suitable for the transmission of West Nile virus. These cities experienced an average increase of 18 days compared to the early 1970s.","ai_generated":true,"unit":"climcent-000031#insight-1","date_modified":"2026-10-23"},{"text":"The most significant increases in annual mosquito disease days were recorded in San Francisco, CA (52 days), Reno, NV (50 days), Santa Maria, CA (49 days), Albany, GA (41 days), and Salinas, CA (40 days). Regionally, the Southeast, Northeast, and Northwest saw the largest average increases, each adding 20 days since 1970.","ai_generated":true,"unit":"climcent-000031#insight-2","date_modified":"2026-10-23"},{"text":"From 1996 to 2025, the U.S. regions with the highest average annual mosquito disease days were the South (262 days, 72% of the year) and the West (261 days, 71% of the year).","ai_generated":true,"unit":"climcent-000031#insight-3","date_modified":"2026-10-23"},{"text":"Warming is projected to expand the risk of Aedes-transmitted viruses, such as dengue and Zika, from the South and Southeast into the Ohio Valley, Upper Midwest, and East Coast by 2050. Specifically, significant dengue risk expansion is projected throughout Gulf Coast states by 2080, and a 2026 study suggests 4 million more California residents could face dengue transmission risks.","ai_generated":true,"unit":"climcent-000031#insight-4","date_modified":"2026-10-23"},{"text":"Globally, rising temperatures are expected to lengthen transmission seasons and expand the geographic range of malaria and dengue. An estimated 18% of dengue cases in Asia and the Americas between 1995 and 2014 are attributed to warming that has already occurred.","ai_generated":true,"unit":"climcent-000031#insight-5","date_modified":"2026-10-23"}],"climate_tags":["malaria","climate change","vector-borne disease","effects of climate change on human health"],"geography_discussed":["Asia","Americas","Africa","California","Florida","Puerto Rico","Canada"],"frame_perspective":[],"analysis_type":["long-term trend analysis","geographic risk assessment"]},{"id":"climcent-000277","url":"https://climateinsightsdirectory.org/document/climcent-000277","title":"U.S. FACES A RISE IN MOSQUITO ‘DISEASE DANGER DAYS’","publisher":{"name":"Climate Central","organization":"climate-central"},"document_type":"report","language":"en","date_published":"2018-08-08","source_url":"http://assets.climatecentral.org/pdfs/August2018_CMN_Mosquitoes.pdf?pdf=Mosquitoes-Report","generator":"Climate Insights Directory","generated_fields":["summary","key_insights","climate_tags","geography_discussed","analysis_type"],"summary":{"text":"Climate Central analyzed temperature data from 244 U.S. cities to determine the increase in days falling within the 61-93°F range suitable for disease transmission by Aedes and Culex mosquitoes. The analysis found that 94% of these cities are experiencing an increase in these 'disease danger days' since 1970, with significant increases noted in California, the Southwest, and some northern cities. While most areas face higher risks, some locations like Phoenix may become too hot for mosquito survival. The report also highlights that warmer temperatures shorten the Extrinsic Incubation Period (EIP) of viruses, potentially increasing the number of infectious mosquitoes and expanding the range of species like Aedes albopictus.","ai_generated":true,"unit":"climcent-000277#summary","date_modified":"2026-10-23"},"key_insights":[{"text":"Analysis of 244 U.S. cities shows that 94 percent (229 cities) have experienced an increase in 'disease danger days'—days with average temperatures between 61 and 93 degrees Fahrenheit—since 1970.","ai_generated":true,"unit":"climcent-000277#insight-1","date_modified":"2026-10-23"},{"text":"The cities with the largest increases in disease danger days include Reno, NV, San Francisco, CA, Santa Maria, CA, Las Cruces, NM, El Paso, TX, Tucson, AZ, Helena, MT, Erie, PA, and Bluefield, VA.","ai_generated":true,"unit":"climcent-000277#insight-2","date_modified":"2026-10-23"},{"text":"Rising temperatures can accelerate the transmission of viruses by shortening the Extrinsic Incubation Period (EIP), which is the time it takes for a virus to develop inside the mosquito and become transmittable to humans.","ai_generated":true,"unit":"climcent-000277#insight-3","date_modified":"2026-10-23"},{"text":"The land area in the U.S. suitable for Aedes albopictus mosquitoes is projected to grow from 5 percent to approximately 50 percent by 2100, potentially placing 60 percent of the northeastern U.S. population at risk for diseases such as Zika, dengue, and West Nile virus.","ai_generated":true,"unit":"climcent-000277#insight-4","date_modified":"2026-10-23"},{"text":"Extreme heat may limit disease transmission in some areas; for instance, Phoenix has seen a decrease in disease danger days since 1970 because more days now exceed 95 degrees Fahrenheit, which is beyond the range for transmission.","ai_generated":true,"unit":"climcent-000277#insight-5","date_modified":"2026-10-23"}],"climate_tags":["climate change","vector-borne disease","public health"],"geography_discussed":["Puerto Rico","Texas","Florida","Hawaii","California","New Mexico","Arizona","Montana","Pennsylvania","Idaho","Vermont","Washington","New York","Michigan","Honolulu","San Juan","Phoenix","Raleigh","Atlanta","South America","Central America","Caribbean"],"frame_perspective":[],"analysis_type":["temperature trend analysis","geographic risk assessment"]}]}